Orplid TK

Type 4
yellow / Au 70.0
palladium-free

Composition: Au 70.0 / Ag 13.6 / Cu 9.9 / Pt 5.5 / Zn 0.9 / Ir 0.1
Standard: DIN EN ISO 22674
Colour: yellow
Melting range °C: 895–925
Soft annealing: 15 mins at 750 °C / quench in water
Hardening: 15 mins at 450 °C / air
Preheating temperature °C: 700
Casting temperature °C: 1055
Further heating after melting (secs): electr.: 15–20
inductive: 5–8
flame: 5–8
Density g/cm3: 15.4
Solders: Orplid solders 825, 790, 760
Vickers hardness (HV 5/30): w: 190
a: 255
g/b: 250
0.2% proof stress (MPa): w: 375
a: 620
g/b: 645
Elongation at break (%): w: 35
a: 15
g/b: 10
Spruing: Following the rules for dental applications (see General Instructions for Use)
Investment: Phosphate-bonded investment materials (Cehacast P or Cehacast Speed)
Preheating: 700 °C, 30 to 120 mins until end temperature, depending on size of mould
Casting: 1055 °C, possibly increase by 20°C–30°C for resistance-heated vacuum pressure
casting. Graphite crucible or open flame with ceramic crucible.
Finishing: With carbide burs and/or ceramic-bonded stones
Cleaning: Ultrasonic cleaning or steam jet cleaning
Soldering: Orplid solders 825, 790, 760